I understand that a NVidia card is of course not optimal for mining due to it's inherent lower MHhash/s speed, but if you are stuck mining with a 560 Ti (bought it for gaming, then decided to go mining later, whatever), here is how I increased my hash rate from 90MH/s to 108.2 MH/s:

No, I am sharing my bitcoins with my parents (just split the purchase of a bitforce single with my mom, they are perfectly aware about mining.) I guess technically this means that I am in essence paying for the electricity, but the addition of a 5970 that is all mine to my system doesn't cost me extra and my parents support my venture.

I'd agree that it was stealing if they were unaware of it or I was using massive quantities of electricity for a mining farm, sure, but one 5970 plus a bitforce single, both that they know about, not, in my mind, is stealing.

No, I am sharing my bitcoins with my parents (just split the purchase of a bitforce single with my mom, they are perfectly aware about mining.) I guess technically this means that I am in essence paying for the electricity, but the addition of a 5970 that is all mine to my system doesn't cost me extra and my parents support my venture.

I'd agree that it was stealing if they were unaware of it or I was using massive quantities of electricity for a mining farm, sure, but one 5970 plus a bitforce single, both that they know about, not, in my mind, is stealing.

If you continue mining with the 560 you will be losing money. Period. You'll make more money from it sitting on a shelf. @ 200 watts, you can run a 7970 and get ~600 MH/s 6x the output as the 560, yet half of that income is paying the electric bill.

Your friend takes you to a bar. You offer to buy him a drink (using the computer). You do. The rest of the night, he sneaks behind your back and orders 5 more drinks on your tab (running a gpu farm). He walks away drunk (bitcoins) while you are forced to pay (electricity)